package com.funny.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {

    public String paymentInfoOK(Integer id) {
        return "线程池： " + Thread.currentThread().getName()
                + "   paymentInfoOK,id:" + id + " 正常访问！";
    }

    @HystrixCommand(
            fallbackMethod = "paymentInfoTimeoutFallback",
            commandProperties = {
                    @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "5000")
            })
    public String paymentInfoTimeout(Integer id) {
        //int t = 10 / 0;
        // 休眠一会儿(秒)
        try { TimeUnit.SECONDS.sleep(3000); } catch (InterruptedException e) { e.printStackTrace(); }
        return "线程池： " + Thread.currentThread().getName()
                + "   paymentInfoTimeout,id:" + id + " 耗时(秒):";
    }

    public String paymentInfoTimeoutFallback(Integer id) {
        return "线程池： " + Thread.currentThread().getName()
                + "  系统繁忙或允许报错，请稍后再试,id:" + id + "  o(╥﹏╥)o";
    }

    // ------服务熔断
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback", commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"),              //是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),    //请求数达到后才计算
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"), //休眠时间窗
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60"),  //失败率达到多少跳闸
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id) {
        if (id < 0) {
            throw new RuntimeException("****id 不能为负数");
        }
        String serialNumber = IdUtil.simpleUUID();

        return Thread.currentThread().getName() + "\t" + "调用成功，流水号：" + serialNumber;
    }

    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id) {
        return "id 不能为负数,请稍后再试， o(╥﹏╥)o id: " + id;
    }
}


